Rei has multiple possible other meanings: A). According to Google Translate, it means, "king" in Portuguese. B). Because of the fact that it is a Biblical character's name, it is possibly of Hebrew origin. C). Rei is an alternative spelling of Raymond.
Can also mean "clear" or "beautiful" or "intelligent/wise". Just as "Rei", they can be male or female.Some names that contain "Rei": Girls: Reika ReikoBoys: Reiji Reizo